In Betaflight Configurator, check the Presets tab for your specific VTX model (e.g., Rush Tank, TBS Unify).
Are you trying to configure this in ?
Many VTXs come "locked" to legal frequencies/power. You must apply an unlocked table or use the manufacturer’s instructions to unlock it, otherwise, you cannot use high-power modes. Reboot: Always save and reboot after applying a VTX table. To get you the exact answer, I need to know: What is the exact model of your VTX ? What protocol are you using (SmartAudio or IRC Tramp)? vtx-tables
Download the VTX table from the manufacturer's website and use the "Load from file" button in the Video Transmitter tab. In Betaflight Configurator, check the Presets tab for
Copy and paste the manufacturer-provided VTX table text into the Betaflight CLI. You must apply an unlocked table or use
Newer VTXs use SmartAudio 2.1+ (power in dB), while older ones use 2.0 (power in 0-3 values).
Defines if you are using TBS SmartAudio or IRC Tramp.